Bridge for supporting trolley-wires by means of the catenary system.



R. L. ALLEN.

BRIDGE FOB SUPPORTING TROLLEY WIRES BY MBANS OF THE GATENABY SYSTEM. APPLICATION r11.nn me.2v, 1909*.

Patented Nov. 1,1910.

INVENTOR @WK BY. %-Es p nmran STATES inrnur oFFion catenary system; and it consists in the compart of said section.

ROBERT L. ALLEN, F SYRACUSE,

NEW YORK, ASSIGNOR T0 ARCHBOLD-IERADY coin PANY, 0F SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

ERIDGE FOR SUPPORTING TROLLEY-WIRES BY MEANQOF THE CATENARY SYSTEM.

v Specification of Letters Patent.

Application filed August 27, 1909. Serial No. 514,936.

Patented Nov. 1, 1910.

To all whom 'it may concern:

Be it known that 1, ROBERT L. ALLEN, of Syracuse, in the county of Onondaga and State of New York, have invented a certain new and useful Bridge for Supporting Trolley-VVires-by Means of the Catenary System, of which-the following isa specification.

My invention relates to steel structures and has for its object the production of a particularly simple and efiicient bridge for supporting trolley Wires by means of the binations and constructions hereinafter set forth and claimed.

In describing this invention reference is had to the accompanying drawing in which like characters designate corresponding parts in all the views.

Figure l is an elevation, partly brol zen away, of my bridge. Fig. 2 is an elevation looking to the right in Fig. 1. Fig. 3 1s a section on line AA, Fig. 1.

The towers of this bridge forsupporti-ng trolley wires by means of the catenary system are alike in construction and the truss "thereof is connected to both in the same way, hence but one tower and one end of the truss is illustrated. Each tower usually comprises two main channel-iron elements or posts 1 spaced apart at their bases and converging toward their upper ends, and members 2 interposed between the main elements.

The truss consist. of upper and lower elements or chords 3 and 4, posts 5 and diagonal members 6 between the chords. The upper chord 3 extends from one tower to the other in the usual manner, and the lower chord 4 is arranged with its intermediate portion extending substantially parallel to the upper chord 3 and with each of its end portions 7 converging upwardly toward the upper chord and being connected thereto at the tower. A. knee brace 8 is interposed be tween the main elements 1 of the tower and the lower chord The chords 3 and 4- are usually formed of channel-iron.

The posts 5 of the truss are formed of angle-iron V-shaped in cross-section and-the end sections thereof are flattened at 9 and the outer end portion 10 of each flattened section is bent at an angle to the remaining These bent portions 10 are secured by rivets or other means to the webs of the channel-irons constituting the upper and lower chords 3 and 4. The upper end of each post 5 is connected to the lower end of the next post 5 by a diagonal member or tie-piece 6, said diagonal mem bers being secured to the flattened sections 9 of the )osts by means of pivots or bolts- 11 extcn ing through said members and through transverse apertures 12 in the fiattened end sections 9.

The members 2 of the towers are of substantially the same construction as the posts 5 but are not usually connected by tie-pieces. Although my invention is embodied in a bridge for supporting trolley wires by means of the catenary system, obviously it may be embodied in other forms of steel structures.

lVhat I claim is -1. A truss comprising upper and lower chords, posts of angle-iron interposed between the chords, each post having its end sections flattened and secured to the chords,v

and a diagonal member connectingthe upper end of each post with the lower end of the next post, the diagonal members bein secured to the flattened end sections of the posts, substantially as'and for the purpose described.

2. A truss comprising upper and lower chords, and posts of angle-iron interposed between the chords, each post having its end sections flattened, and each flattened end section having its outer portion bent at an angle to the remaining part of said flattened section and secured to one of the chords, substantially as and for the purpose specified. i

3. A truss comprising upper andj lower chords, posts of angle-iron interposed be:

tween the chords, each post having its end sect-ions flattened, and eaclrflattened end section having its outer portion l mit at an angle to the remaining part (it said flattened section and secured to one g oi the chords. and a diagonal member cgu nrnting the upper end of each post with tlielowcr end of the next post, the diagonal members being socuredto the flattened sections of the posts, substantially as and for the purpose set. forth.

4. A steel structure comprising opposing main elements spaced apart and members connecting the main elements, said members being formed of angle iron and each menu her having its end sections flattened, and

the other,

reach end section having its outer portion bent at an angle to the remaining part of said flattened section and secured to one of the main elements, 'pnd diagonal members connecting the formed members, the diagonal members bein secured to the flattened end sections of said former members, substantially as and for the purpose specified. 5. A brid e for supporting trolley wires by means 0 the catenary system comprising towers s aced apart, a truss connecting the towers, t e truss comprising upper and lower chords formed of channel-iron, the upper chord extending from one tower to and the lower chord havin its intermediate portion extending substantially parallel to the upper chord, and each of its end ortions converging toward the upper ch01 posts interposed between the chords and formed of angleiron, each post havin its end sections fiattened,and each flattened end section having its outer portion bentat an angle to the remaining part of the flattened section and secured to the web-of one of the chords, and a diagonal member connecting the up r end of each post with the lower end of t e next post, the dia onal members being secured to the fiattene secsigned my name in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 17th day of August, 1909;

ROBERT L. ALLEN.

Witnesses:

E. K. SEEMILLER, FREDERIC G. BODELL. 

